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bug#31214: hang in Faccept_process_output

From: Glenn Morris
Subject: bug#31214: hang in Faccept_process_output
Date: Thu, 19 Apr 2018 15:53:52 -0400
User-agent: Gnus (www.gnus.org), GNU Emacs (www.gnu.org/software/emacs/)

Glenn Morris wrote:

>> Then maybe we should pass a non-nil timeout to accept-process-output,
>> and/or a non-nil last argument.
>> IOW, I'm not sure the bug is not in the test itself.
> Is it not a standard usage (start a process, and while it's live, accept
> output from it)?

In fact, doesn't this imply that any use of the form
(accept-process-output process) may hang Emacs forever, which seems bad?

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